package org.openschool.service;

import java.util.*;
import org.openschool.domain.*;

public interface UsersService {

	public void addUser(User user);
	
	public User getUser(String usernmae);
	
	public void removeUser(String username);
	
	public void updateUser(User user);
	
	public List<User> listUsers();
	
	
	
}
